切换到实盘环境

- HL: WS/REST 从 testnet 切换到 mainnet
- BG: 删除 paptrading header（实盘 key 不以 bg_ 前缀区分）
- config: 调整交易参数
- scanner: 更新跟踪币种列表

config.json

@@ -1,9 +1,9 @@
 {
   "test_mode": false,
   "trade_enabled": true,
-  "arb_threshold": 0.02,
+  "arb_threshold": 0.3,
   "scan_interval_ms": 200,
-  "trade_threshold": 0.03,
+  "trade_threshold": 0.3,
   "trade_amount_usd": 20,
   "trade_cooldown_ms": 30000,
   "alert_cooldown_sec": 300,
@@ -13,11 +13,11 @@
   "initial_capital": 1000,
   "taker_fee_bitget": 0.060,
   "taker_fee_hyperliquid": 0.045,
-  "take_profit_pct": 0.20,
+  "take_profit_pct": 0.3,
   "spread_reverse_exit_pct": 0,
   "position_timeout_sec": 1800,
   "leg_delay_ms": 300,
   "reversal_tolerance_pct": 0.1,
-  "scale_step_pct": 0.10,
+  "scale_step_pct": 0.3,
   "scale_cooldown_sec": 5
 }